Document and Entity Information (USD $)
12 Months Ended
Aug. 31, 2014
Nov. 13, 2014
Feb. 28, 2014
Document and Entity Information      
Entity Registrant Name BSD MEDICAL CORP    
Document Type 10-K    
Document Period End Date Aug. 31, 2014    
Amendment Flag false    
Entity Central Index Key 0000320174    
Current Fiscal Year End Date --08-31    
Entity Common Stock, Shares Outstanding   39,689,209  
Entity Filer Category Smaller Reporting Company    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Well-known Seasoned Issuer No    
Document Fiscal Year Focus 2014    
Document Fiscal Period Focus FY    
Entity Public Float     $ 30,731,822
Entity Incorporation, State Country Name Delaware    
Entity Incorporation, Date of Incorporation Jul. 03, 1986